Vertical Pressure Leaf Filters (VPLFs) have become indispensable in industries like chemicals, food processing, and pharmaceuticals due to their compact design and high filtration efficiency. These enclosed systems leverage pressure-driven separation to achieve clarity and precision in demanding applications.
Core Working Principle
VPLFs operate through a three-stage process:
1.Precoating & Filtration: A filter aid (e.g., diatomaceous earth) is mixed with the feed liquid (0.5–1% concentration). Under pressure, this mixture forms a precoat layer on vertically mounted Wire Mesh Filter Leaves, trapping impurities while allowing clear liquid to flow into the leaf manifold. 2.Cake Formation: Solids accumulate on the mesh, creating a filter cake that further refines separation. The stainless steel wire mesh (25–250 μm precision) ensures consistent particle retention and chemical resistance.
3.Automated Discharge: When pressure peaks (3–4 bar), filtration halts. A pneumatic vibrator shakes the leaf assembly, dislodging the wet cake efficiently without manual intervention.
Key Components Enhancing Efficiency
- Wire Mesh filter leaves: These vertical leaves maximize surface area within a minimal footprint. Their anti-clogging design and regenerability reduce downtime and disposal costs.
- Sealed Pressure Vessel: Enclosed operation prevents volatile liquid loss and allows high-temperature filtration via integrated jackets.
- Integrated Conveying Systems: Post-discharge, residues are transported via flat flex belts. These polyurethane/nylon-reinforced belts handle high-tension loads and offer quiet, long-distance material transfer, streamlining waste management.
Industry Applications & Advantages
VPLFs excel in edible oil refining, pharmaceutical clarification, and chemical catalyst recovery. Their efficiency stems from:
- Energy Savings: Reduced pump requirements vs. vacuum filters.
- Zero Filter Cloth Use: Eliminates consumable costs.
- Adaptability: Customizable mesh grades and automated controls for diverse viscosities and particle sizes.
